The beat the song is built on is one bar, played through bars 1-20, 22 and 28, and 10 more places -- 32% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on ride, snare and kick, counted in sixteenth notes. On its own it scores 27 out of 100 -- a fair first song -- and the thing that decides that is the speed of the hand keeping time.
The whole song is 85 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
A part this hard is not learned by playing it slowly and hoping. The room opens it on its simplest reduction -- the timekeeper alone, at 150 BPM -- and adds the notes back over 3 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 150, 175 and 200 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on ride, snare and kick, in 4/4 at 200 BPM, counted in sixteenth notes. It is written out above, and it covers 32% of the bars the kit plays.
Bars 1-20, 22, 28 and 45-54, and 9 more places. The time is kept on the ride to start with, and it changes 11 times over the song.
27 out of 100 on its own -- a fair first song. The song as a whole is 85 out of 100. Hard, and what makes it hard is how many notes a second it asks for.